Bosch BULLS 650-185, Руководство по эксплуатации

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Description
3.3.6 Seat post
Seat posts are n
ot just
designed to fasten the
saddle but also to adjust exactly to the optimum
sitting position. The seat post can:
• adjust the seat height in the seat tube
• adjust the saddle horizontally with a clamping
mechanism and
• adjust the saddle angle by swivelling the entire
saddle clamping mechanism.
Dropper
seat posts feature a remote control on
the handlebars, which can be used to lower the
seat post – at a traffic light, for example – and
raise it again.
3.3.6.1
Standard
seat post
Figure 29: Example of
standard
seat post with either one
or two seat clamping screws
Standard
seat posts have a rigid link between
the saddle and the post.
Standard
seat posts
which are angled more markedly towards the rear
are called offset seat posts. Offset seat posts
provide a greater distance between the saddle
and the handlebars.
With s
t
andard
saddle posts, the saddle is
attached to the head with one or two saddle
clamping screws. It is recommended to lubricate
the thread in these screws to ensure sufficient
tension when tightening the
bolt
.
Standard
saddle posts are fastened into the
seat tube with either a quick release or a
screwable clamp.
Figure 30: Example of a quick release
3.3.6.2 Suspension seat post
Spring-loaded seat posts can reduce shock after
one-time hard impacts, thus improving ride
comfort significantly. However, suspension seat
posts are not able to compensate for bumps in the
road.
If the seat post is the only suspension element,
the entire vehicle is a non-suspended mass. This
has an unfavourable effect on loaded touring
bikes or
ebikes
with child trailers.
Suspension seat posts feature small, heavy-duty
slide bearings, guides and articulated joints. If
they are not lubricated on a regular basis, the
sensitive response behaviour diminishes
considerably, causing excessive wear.
The pre-tensioning in non-damped suspension
seat posts must be adjusted in such a way that the
suspension seat post does not deflect with just
body weight. This prevents the suspension seat
post from deflecting and bobbing intermittently at
higher pedalling frequencies or if the rider pedals
irregularly.
The spring stiffness can be set lower with damped
suspension seat posts, thus making use of the
negative deflection.
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